The Cosmic Web

Author: J. Richard Gott
Publisher: Princeton University Press
ISBN: 9781400873289
Size: 11.83 MB
Format: PDF
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J. Richard Gott was among the first cosmologists to propose that the structure of our universe is like a sponge made up of clusters of galaxies intricately connected by filaments of galaxies—a magnificent structure now called the "cosmic web" and mapped extensively by teams of astronomers. Here is his gripping insider's account of how a generation of undaunted theorists and observers solved the mystery of the architecture of our cosmos. The Cosmic Web begins with modern pioneers of extragalactic astronomy, such as Edwin Hubble and Fritz Zwicky. It goes on to describe how, during the Cold War, the American school of cosmology favored a model of the universe where galaxies resided in isolated clusters, whereas the Soviet school favored a honeycomb pattern of galaxies punctuated by giant, isolated voids. Gott tells the stories of how his own path to a solution began with a high-school science project when he was eighteen, and how he and astronomer Mario Jurič measured the Sloan Great Wall of Galaxies, a filament of galaxies that, at 1.37 billion light-years in length, is one of the largest structures in the universe. Drawing on Gott’s own experiences working at the frontiers of science with many of today’s leading cosmologists, The Cosmic Web shows how ambitious telescope surveys such as the Sloan Digital Sky Survey are transforming our understanding of the cosmos, and how the cosmic web holds vital clues to the origins of the universe and the next trillion years that lie ahead.

The Cosmic Web

Author: J. Richard Gott
Publisher:
ISBN: 069115726X
Size: 14.34 MB
Format: PDF, ePub, Docs
View: 72

Semi-autobiographical discussion of astronomy and astronomers, and history of astronomy and cosmology.--

Dark Matter And Cosmic Web Story

Author: Jaan Einasto
Publisher: World Scientific
ISBN: 9789814551069
Size: 13.53 MB
Format: PDF
View: 48

The concepts of dark matter and the cosmic web are some of the most significant developments in cosmology in the past century. They have decisively changed the classical cosmological paradigm, which was first elaborated upon during the first half of the 20th century but ran into serious problems in the second half. Today, they are integral parts of modern cosmology, which explains everything from the Big Bang to inflation to the large scale structure of the Universe. Dark Matter and Cosmic Web Story describes the contributions that led to a paradigm shift from the Eastern point of view. It describes the problems with the classical view, the attempts to solve them, the difficulties encountered by those solutions, and the conferences where the merits of the new concepts were debated. Amidst the science, the story of scientific work in a small country occupied by the Soviet Union and the tumultuous events that led to its breakup are detailed as well. This book is accompanied by a website which contains additional material: copies of the originals of some crucial papers, astronomical movies, and movies which showcase the private life of the author. The link is given below: http://www.aai.ee/~einasto/DarkMatter/ Contents:PrologueClassical Cosmological ParadigmGalactic Models and Dark Matter in the Solar VicinityGlobal Dark MatterThe Cosmic WebThe Nature of Dark MatterThe Structure of the Cosmic WebCosmic Inflation, Dark Energy and the Evolution of the UniverseEpilogue Readership: Students and professionals in astrophysics, cosmology and physics; non-experts interested in the history of science, and the life and social activity of scientists in a country occupied by Soviet Union for 50 years. Keywords:Dark Matter;Cosmic Web;Large-Scale Structure of the UniverseKey Features:The development of the concepts of dark matter and the cosmic web as a change in the worldview (paradigm) in cosmology is describedA personal view of the development of dark matter and cosmic web concepts as seen by a non-Western scientistDescription of scientific work and social activity in a small country occupied by the Soviet Union; the participation of scientists in processes which led to the collapse of the Soviet Empire, and to the end of the Cold WarReviews: “A deeply humane but also political account, the book offers a fascinating insider tour into one of the most important processes of cosmology. Einasto a pioneer of dark matter research offers a thorough scientific description of the discovery of dark matter.” Anne Liljeström Editor Stars and Universe “A fascinating combination of the scientific history of dark matter with personal recollections, by an author who was there both for the discovery of DM and for the (singing revolution) in Estonia.” Virginia Trimble Professor of Astronomy University of California, Irvine

The Zeldovich Universe Iau S308

Author: Rien van de Weygaert
Publisher: Cambridge University Press
ISBN: 1107078601
Size: 19.22 MB
Format: PDF, ePub, Mobi
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On megaparsec scales, matter and galaxies have aggregated into a complex network of interconnected filaments, wall-like structures and compact clusters surrounded by large near-empty void regions. Dubbed the 'Cosmic Web', theoretical and observational studies have led to its recognition as a key aspect of structure in the Universe, representing a universal phase in the gravitationally driven emergence and evolution of cosmic structure. IAU Symposium 308 marked the centenary of the birth of the Russian physicist and cosmologist Yakov B. Zeldovich (1914-87), who was instrumental in the development of this view of structure formation. His seminal work paved the way towards an understanding of the complex web-like structure observed in our Universe. This volume synthesizes the insights obtained from many different observational and theoretical studies, and helps prepare researchers and students working in this vibrant field for the many upcoming surveys.

The Cosmic Web And The Role Of Environment In Galaxy Evolution

Author: Ryan Cybulski
Publisher:
ISBN: OCLC:964629786
Size: 18.89 MB
Format: PDF, ePub
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The Universe, on extra-galactic scales, is composed of a vast network of structures dubbed the "cosmic web". One of the most fundamental discoveries about the evolution of galaxies is that their properties have a dependence on their location relative to this cosmic web (i.e., their environment). However, detailed studies of the environmental dependence on galaxy evolution have been extremely challenging due to the inherent complexity of the structures on the largest scales, a plethora of techniques being used to try to map the cosmic web, and other confounding factors, such as the masses of galaxies, that also affect their evolution. In this work, we will present a technique for characterizing the environments of galaxies in the cosmic web, which is comprised of two separate, but complementary, methods that together provide a more complete measure of environment. After some introductory background in Chapter 1, we will demonstrate these mapping techniques on the Coma Supercluster, and present an analysis of the star-formation activity of about 4,000 galaxies in the supercluster environment in Chapter 2. Next, in Chapter 3 we present a greatly expanded application of our mapping techniques encompassing about 60,000 galaxies within 200 Mpc that addresses several outstanding questions from the Coma Supercluster study, and also leads to new intriguing insights into the evolution of galaxies as a function of environment. Then, in Chapter 4 we present a pilot study focusing on galaxy evolution as traced by the gas content around two galaxy clusters. We also expand upon this pilot study in Chapter 5, whereupon we examine more closely the resiliency of molecular gas content, compared to the atomic gas, to the effects of the cluster environment. And finally, in Chapter 6 we present some concluding remarks and explore some promising avenues for future study.